Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d704527416b27db…

MALICIOUS

PDF

101.4 KB Created: 2021-02-27 09:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a40f82f8676ef3133ddf6bea6c7a7cc2 SHA-1: 4493baa6da4fb676b9a3cf2e80edb75ecb437fa6 SHA-256: 7d704527416b27db001ba96ba9f729ef64fbd2159bbc33263d28696475641305
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains fragments that suggest it is a lure, possibly related to search terms like 'python dict keys values order', to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=python+dict+keys+values+order In PDF document text
    • http://desokore.medianewsonline.com/les_mis_2012_summary.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/181326160.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hjUif8c/66498331285.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1E6x7Ky/xinaxov.pdfIn PDF document text
    • https://cdn.sqhk.co/wafifovuwel/jg1BhbT/nursing_assistant_jobs_hiring_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bamopilu/1gjgjia/turare.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/sanoja.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/bBetSjj/mjr_digital_cinemas.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/81493433128.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/fakobikujapejokokaman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazepoxi.atwebpages.com/how_big_is_the_hobbit_book.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/android_bluetooth_audio_auto-_connect.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/38010856090.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 10612 bytes
SHA-256: 31d4c02e05d35c47b56195e1ebc88f84a4f78e63bdc1e0890982c6a32564e491
font_01_sfnt_off00014d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D05 5256 bytes
SHA-256: b1214463c9675dbdae5aaa3dd6f96d9ca68ebc344bbb77cd2bcd1dc9ebc614b9
font_02_sfnt_off00015eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEA 12928 bytes
SHA-256: f806c5c1f9de61be5161f1e6ce866e7f1d7945b0e1e0f1c2318c751d51e758fe

Open this report in the interactive analyzer, or submit your own file for analysis.